If any of you don't know what LineRider is, it's a game where you draw lines (regular or accelerated), as a guy rides a sled down them. Just search youtube for Linerider, and look at some of the things you can do.
Anyway, this isn't necessarily a request, but I would like to see some form of linerider for the PSP. I am powerless, I as have no flash experience at al. But, somebody might be able to make it, so I'm putting it out there.
As for controls, you could use the analog stick as the mouse (duh), and use X to click on each control, and then click X to start a line. Then, you could draw a line with the analog stick, or draw a straight line with the d-pad.
Hope this can go somewhere. If it's possible to convert a swf file to play on the psp, or you just wanna see the game, go to http://linerider.com/linerider.swf